BACKTRACK_BINARY_RC
Binary Backtrack Search Using Reverse Communication

BACKTRACK_BINARY_RC is a FORTRAN90 library which carries out a backtrack search for a set of binary decisions, using reverse communication (RC).

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

BACKTRACK_BINARY_RC is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

BISECTION_RC, a FORTRAN90 library which seeks a solution to the equation F(X)=0 using bisection within a user-supplied change of sign interval [A,B]. The procedure is written using reverse communication (RC).

CG_RC, a FORTRAN90 library which implements the conjugate gradient method for solving a positive definite sparse linear system A*x=b, using reverse communication (RC).

LOCAL_MIN_RC, a FORTRAN90 library which finds a local minimum of a scalar function of a scalar variable, without the use of derivative information, using reverse communication (RC), by Richard Brent.

ROOT_RC, a FORTRAN90 library which seeks a solution of a scalar nonlinear equation f(x) = 0, or a system of nonlinear equations, using reverse communication (RC), by Gaston Gonnet.

ROOTS_RC, a FORTRAN90 library which seeks a solution of a system of nonlinear equations f(x) = 0, using reverse communication (RC), by Gaston Gonnet.

SORT_RC, a FORTRAN90 library which can sort a list of any kind of objects, using reverse communication (RC).

SUBSET, a FORTRAN90 library which enumerates, generates, randomizes, ranks and unranks combinatorial objects including combinations, compositions, Gray codes, index sets, partitions, permutations, polynomials, subsets, and Young tables. Backtracking routines are included to solve some combinatorial problems.

ZERO_RC, a FORTRAN90 library which seeks a solution of a scalar nonlinear equation f(x) = 0, using reverse communication (RC), by Richard Brent.

Source Code:

• backtrack_binary_rc.f90, the source code.

Examples and Tests:

• backtrack_binary_rc_test.f90, a sample calling program.
• backtrack_binary_rc_test.txt, the output file.

List of Routines:

• BACKBIN_RC uses reverse communication for binary backtracking.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the FORTRAN90 source codes.